18. Aqueous Equilibrium
Acid-Base Indicators
5PRACTICE PROBLEM
The indicator bromthymol blue was added in each of the solutions shown below. Solution A contains 0.020 M hydrocyanic acid. Solution B contains a mixture of 0.020 M hydrocyanic acid and 0.020 M sodium cyanide. Using the figures below as reference, identify the solution with the lower pH.
![](https://lightcat-files.s3.amazonaws.com/problem_images/1df33168aec488a4-1667307541814.jpg)
![](https://lightcat-files.s3.amazonaws.com/problem_images/2cd4778e5c20fa1c-1667307530485.jpg)
The indicator bromthymol blue was added in each of the solutions shown below. Solution A contains 0.020 M hydrocyanic acid. Solution B contains a mixture of 0.020 M hydrocyanic acid and 0.020 M sodium cyanide. Using the figures below as reference, identify the solution with the lower pH.